life of Riley definition

A life of luxury: “Sheila found herself living the life of Riley after she won the lottery.” The expression comes from a popular song of the 1880s, “Is That Mr. Reilly?”, in which the title character describes what he would do if he suddenly became wealthy.

life of Riley

Also,
life of Reilly. An easy life, as in Peter had enough money to take off the rest of the year and live the life of Riley. This phrase originated in a popular song of the 1880s, “Is That Mr. Reilly?” by Pat Rooney, which described what its hero would do if he suddenly came into a fortune.